We went to the library yesterday and found an awesome book: Mudpies to Magnets: a preschool science curriculum. It's got some fun science experiments for little kids. The great thing is that they're labeled for the ages the book targets: 2+, 3+, 4+ or 5+. We tried one of the 2+ experiments today: put a slosh of vinegar in a cup of water. Drop in 3 raisins and add a scoop of baking soda. Watch the raisins dance to the top!